SCP Questions of This Month: December

This post is a collection of questions and answers about the Semi-Automatic Classification Plugin (SCP) and remote sensing which were discussed in the Facebook group and the Google+ Community this month.
These questions vary from supervised classification technique to software issues, and can be useful to the readers of this blog for solving issues about the use of SCP.

Question

I don't understand why there is no Sentinel-2 data for Berlin from June 2016 onwards when there is lots on the science hub - the api should have it as well, shouldn`t it!? Or how can I access through the amazon cloud?

Question

I compared some NDVI products of the same scene/ same day (for s2a/landsat) with different sources or processing ways.
1) NDVI from "Landsat Higher-Level Data Products" which is resulting from the NASA produced SR.
2) NDVI resulting from your PlugIn after preprocessing of the scene
3) Sentinel 2 NDVI previously processed with Sen2Cor
I noticed that NDVI values from 1 are more similar to 3 than 2.
Since I think that the Sen2Cor has the best Atcor, I would trust the Product 3 the most and conclude that the product resulting from your plugin is better than from NASA product.
Anyway, what I want to ask:
Is there a document where I can read about what is actually happening in the "preprocessing" of the data?!

Question

I have 1 question for the pre process under QGIS 2.14.9 LTR(64bit) and SCP 5.2.4.
I tried to use Landsat 8 data. I set this image as an input image and then set training input.
But SCP said "Error[61]: Projection error. Try to assign projection to raster **"
Before this operation, I already set projection to the image, EPSG 3100 (JGD2000/UTM zone 54N). I got these bands from USGS Earth Explorer, then merged in ArcGIS the tiff files into 1 file and clip them.
I was able to import and classify the image by SCP 4.9.6 or before...

Question

I am trying to classify images from the same place at different time series. When i create training polygons it is necessary all of the images and bands to be loaded in the project? Do i have the potential to take samples from only one band or rgb and load the other images afterwards?

Question

Do you think if I want to find out LST for my home city it will be easy as loading the right LANDSAT or ASTER image instead of the Paris?

Answer

You can use Landsat images for your area; however, for better accuracy the emissivity values should be calculated from field survey. Also, you can use NDVI.for emissivity estimation. For the methodology you can read this paper Sobrino, J.; Jiménez-Muñoz, J. C. & Paolini, L. 2004. Land surface temperature retrieval from LANDSAT TM 5 Remote Sensing of Environment, Elsevier, 90, 434-440

Question

How can I import the previous ROI file (.shp) in this latest version? Otherwise, I have to make new .scp file and again create new ROI..
Secondly, I do not want that my ROIs would automatically be saved in the signature list. In the previous version, I have had such choice and in this current version, I do not find it.

Question

I have a question about the pan sharpening; I have read the documentation and I know that the Brovey Transform is applied when the pan sharpen function is carried out when using SCP. My question is: the Intensity has the same value for all the calculated pan sharpened bands? the reason is that the pan sharpening works very well when is necessary to combinate bands. However, when I calculate an index (as NDVI), the result does not seem affected by pan sharpening, showing as apparently 30 m resolution image (although the file has resolution 15 m).

Question

I'm struggling with generating the final classified output; after clicking run, it comes up with error 28 (set ram to lower value) after a while. I have set it to the lowest value possible, but it still doesn't work.